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Logic Gates

backcorp

I made an Excel Spreadsheet for Logic gates. Anyone want it? Amongst other stuff; I decoded 6 bit BCD to 64 independent gates. One for each number and zero. I watched the video on 7 segment displays and added/reconfigured the gates into 2 4 bit strings (ones & tens) for two 4 in 7 out chips as shown in the video. Then I duplicated the chip, all with Logic Gates. I wrapped it up with an Excel formula based pair of 7 segment displays from the Logic Gates 1s & 0s. You may need Excel formula knowledge to take full advantage of this but you can make anything you want. I think this would be handy for element14 for showing the concept in a big way. What I ask in return is a little help here and there. I'm not looking for a burdensome commitment or tutor, just someone who could simply state a term or resource that I could look-up when I ask a question. If anyone is interested let me know and I'll send it to you. You can decided if it is worth a deal. I lack the math skills for flipping the poles on various magnets which is my preferred subject. Maybe one of you is good at such things. Anyway, it was fun to learn and make and now it will likely die in a cold dark folder on my computer. Please ask for it.

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  • 0 in reply to ajcc

    I think I'm done with it. I could add more input labels to the gates but most of it is self explanatory by the location the gate is placed. You can see on the last sheet how labeling was totally necessary. I went from zero knowledge about logic gates to a creator in less than a week, that was unexpected. I've never blogged before and in my mind it was so simple to make, there is not much to say about it. It all started with wanting to learn quadrature for my project. Then I read an article on a 4 channel switch. It showed '4-input gates' with 2 power supplies and I got a little lost. Then, I didn't know how to discern the difference (with logic gates) of a [0,1] and a [1,0]. After I figured that out, it was just think and do. My first 4 channel switch was not elegant but it worked. I went back and the 2nd. 4 channel switch was so much simpler. Now I'm not kidding myself or anyone else, some educated people in the field might laugh at my mistakes, "long-cuts' as apposed to short-cuts. That is a video I'd like to see, what I got right and what I got less than elegant.

     

    Give me your email or teach me another way to get it to you and I'll send you the first copy.

     

    I'm new here and I don't know the ins & outs of it but, I appreciate the links and advise a lot.

     

    And thanks Adrian,

    Jeff

     

    Wow, this could be loosely considered a blog image

  • 0 in reply to backcorp

    Trying things out in Excel is a great way to learn new things indeed. Welcome to the element14 community! There's an introduction to new users if you're curious what this site is about.

     

    The 4-channel switch you're talking about might be a mux? It was very common power 4000-series bilateral switches/muxes (such as the classic 4016) from a split power-supply (plus, minus and ground) when used to switch analog signals that goes negative. If you feed a negative voltage into a logic chip powered by Vdd and GND then things will not work, as the protection diodes will short the input to ground. If you're looking at them as digital gates I can fully understand why this would be confusing.

     

    A short summary about what your Excel file does is a good start, maybe some images demonstrating things like your nice BCD to 7-segment decoder? The easiest way to share the file is to attach it to a blog post:

    image

    In the bottom right corner is a little paper clip:

    image

    Hope that helps and I'm looking forward to seeing your digital logic blogs image
    /Adrian
  • 0 in reply to ajcc

    Thank you for this. I might blog my templet (painters palate [cut & paste]) with my first 3 understandings. The part that resolves with a 7 segment display is big and may be unpleasant to learn. I'd like to think some followers, might get to that point and I'd challenge them to solve the puzzle that I solved. Maybe they will do even better than I did. If I had a big enough demand for the rest of my work, I might walk them through it.

     

    I just came back to say, I understand if you don't want your email out there, who wants there email out in the open to strangers?

    I work nights in California. This might explain a time discrepancy in questions and answers times. At 10:25 AM my time, I say good night.

     

    How dumb am I? Is this the place I would blog?

  • 0 in reply to backcorp

    There are people from all around the world in this community so delay between answers is something we are used to. On top of that a lot of users are professional engineers and only check in on weekends and evenings. So don't worry about being "late" with answers.

     

    On this community we share our knowledge and projects, discuss our problems and ideas so limiting your work to a single set of eyes isn't something I want to do. When you blog about it many more eyes will get to see it and learn from you. Some of those eyes might really enjoy the challenges you give them. On top of that there's a great backlog of blogs created by users of this community over the years, so what you write today might benefit someone in five years time.

     

    If you don't feel like blogging here is what you want to do then that's also fine. You can still check in with your findings, results or questions any time.

     

    /Adrian.

  • 0 in reply to ajcc

    Jeff have since asking this posted a blog with his spreadsheet along with an explanation on how to make the best use of it.